Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa4f6d329ec534a…

MALICIOUS

PDF

67.8 KB Created: 2021-01-25 21:58:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 53e9590b379bfe41e40a33ee0d91c56e SHA-1: f58a05dee9271455839af50f1cd6f8deed44836b SHA-256: efa4f6d329ec534aac8d48990005b1f0b9f4362d10288915b80f7dbac890e4a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. This indicates the document is designed to lure users to a potentially malicious website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector and the ClamAV detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/aws?utm_term=beetalk++free+for+android In PDF document text
    • https://vizifeji.weebly.com/uploads/1/3/0/7/130775372/rimemapipozif.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/igejije/galaxy_air_force_war_apk.pdfIn PDF document text
    • http://itwow.info/g-_stomper_rhythm_premium_key_apklhnil.pdfIn PDF document text
    • http://ewwe.space/spacex_starlink_trackerktkio.pdfIn PDF document text
    • https://cdn.sqhk.co/mapigusene/0iitSjc/classic_muscle_cars_for_sale_in_florida.pdfIn PDF document text
    • http://myfirstsite.xyz/fezumevokataxavebalzq176.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/0a386f4a3b4b.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/c0ji5bG/67771965986.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuwutitaw/gcEhiif/febuzilawigelolexovawaku.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/e210d72499.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/RS6igpf/newezowonid.pdfIn PDF document text
    • https://retowukiri.weebly.com/uploads/1/3/4/5/134592720/3413938.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lexuwusifo.epizy.com/flow_sheet_of_iron_ore_beneficiation.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/xetufojimoru.pdfIn PDF document text
    • http://viwuleraxukopiz.epizy.com/62113940409.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/tifedaf.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/nagefiwefaxalegevamaleti.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/ccna_2_chapter_5_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/nawigodexixolewe.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/vicinity_centres_re_ltd_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/58850340455.pdfIn PDF document text
    • http://suvoxezol.rf.gd/wefogoguxokad.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFC 4836 bytes
SHA-256: e28357f49eb1cf1c2a6d1f6c761734d2ab6313a6620c1f3e4a96bfc74fab6087
font_01_sfnt_off0000db7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7A 10932 bytes
SHA-256: 25684537d3cb8f103400515f307c15d9280fffaeba5336ea80e34746c208dfc0

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